Creates a checksum using ISO 7064 Mod. 37/36. Dashes and whitespaces are ignored. Any other invalid characters will lead to a termination of the function with an error.

Parameters

Parameter	Description
a	Value to create the checksum for.

Example

Parameter a	Result
123AB	X
DADPIDA3897722461	J
DA-DPIDA-3897722461-	J
A12425GABC1234002	M
A1-2425G-ABC1234-002-	M